3D hierarchical hp-FEM applied to elasto-acoustic modelling of layered porous media
2005 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 285, no 1-2, 341-363 p.Article in journal (Refereed) Published
This paper presents a 3-D hierarchical (p-version) finite element description of the solid displacement-fluid displacement form of Biot's equation for elasto-acoustic modelling of multiple-layered isotropic porous media. The convergence related to mesh refinement extensions for different orders of polynomial approximation is briefly discussed for a homogeneous foam. The highest computational efficiency for reasonable levels of the error in the low-frequency region was obtained for fourth-order polynomial finite element interpolations. The main focus is on coupling conditions and on the convergence of solutions to Biot's equations in cases with multiple layers having different material properties. Simulations of a two-layered porous material with low flow resistivity suggest slow convergence rate of the fluid displacement field close to the interface between the layers.
Place, publisher, year, edition, pages
2005. Vol. 285, no 1-2, 341-363 p.
FORMULATION, PROPAGATION, EQUATIONS, 3-D
IdentifiersURN: urn:nbn:se:kth:diva-13421DOI: 10.1016/j.jsv.2004.08.032ISI: 000229701800017ScopusID: 2-s2.0-18544381093OAI: oai:DiVA.org:kth-13421DiVA: diva2:325285
QC 201006182010-06-182010-06-182010-07-14Bibliographically approved